Calsoft Labs’ multi-site team of 10 engineers (US & India) started the engagement in 2010. Calsoft Labs provided the end-to-end support for OpenFlow protocol 1.0 implementation including testing. The implementation was successfully tested with Stanford controller (Open Source) and a customer specific controller.

Our current solution supports OpenFlow Hybrid Mode (OHM) as well as Multiple instances. With Hybrid mode support, the switch can work in either OpenFlow only mode or Hybrid mode (OpenFlow + Legacy) and can switch over from OpenFlow to Hybrid on switch reboot. This feature will help in optimal switch resource usage as in many scenarios OpenFlow will use only partial set of switch ports and the unused ports can be used for legacy switching.

Calsoft Labs’ OpenFlow solution enabled the switch vendor to provide standard hooks for controlling the network traffic, without exposing the complexities of the underlying physical network devices and protocols. Using OpenFlow, network traffic can be controlled by a remote server called controller. The controller can make decision on how to handle the packets. For example, it can drop the packet, or it can add a flow entry directing the switch/router on how to forward similar packets in the future.

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